element provides an accessible, short-text description of any SVG container element or graphics element. //Text in a <title> element is not rendered as part of the graphic, but browsers usually display it as a tooltip. link.append("title") .text(d => d.type); const edgepaths = svg.selectAll(".edgepath") //make path go along with the link provide position for link labels .data(dataset.links) .enter() .append('path') .attr('class', 'edgepath') .attr('fill-opacity', 0) .attr('stroke-opacity', 0) .attr('id', function (d, i) {return 'edgepath' + i}) .style("pointer-events", "none"); const edgelabels = svg.selectAll(".edgelabel") .data(dataset.links) .enter() .append('text') .style("pointer-events", "none") .attr('class', 'edgelabel') .attr('id', function (d, i) {return 'edgelabel' + i}) .attr('font-size', 10) .attr('fill', '#aaa'); edgelabels.append('textPath') //To render text along the shape of a <path>, enclose the text in a <textPath> element that has an href attribute with a reference to the <path> element. .attr('xlink:href', function (d, i) {return '#edgepath' + i}) .style("text-anchor", "middle") .style("pointer-events", "none") .attr("startOffset", "50%") .text(d => d.type); // Initialize the nodes const node = svg.selectAll(".nodes") .data(dataset.nodes) .enter() .append("g") .attr("class", "nodes") .call(d3.drag() //sets the event listener for the specified typenames and returns the drag behavior. .on("start", dragstarted) //start - after a new pointer becomes active (on mousedown or touchstart). .on("drag", dragged) //drag - after an active pointer moves (on mousemove or touchmove). //.on("end", dragended) //end - after an active pointer becomes inactive (on mouseup, touchend or touchcancel). ); node.append("circle") .attr("r", d=> 17)//+ d.runtime/20 ) .style("stroke", "grey") .style("stroke-opacity",0.3) .style("stroke-width", d => d.size/10) .style("fill", d => colorScale(d.group)) node.append("title") .text(d => d.id + ": " + d.label + " - " + d.group); node.append("text") .attr("dy", 4) .attr("dx", -15) .text(d => d.name); node.append("text") .attr("dy",12) .attr("dx", -8) .text(d=> d.size); //Listen for tick events to render the nodes as they update in your Canvas or SVG. simulation .nodes(dataset.nodes) .on("tick", ticked); simulation.force("link") .links(dataset.links); // This function is run at each iteration of the force algorithm, updating the nodes position (the nodes data array is directly manipulated). function ticked() { link.attr("x1", d => d.source.x) .attr("y1", d => d.source.y) .attr("x2", d => d.target.x) .attr("y2", d => d.target.y); node.attr("transform", d => `translate(${d.x},${d.y})`); edgepaths.attr('d', d => 'M ' + d.source.x + ' ' + d.source.y + ' L ' + d.target.x + ' ' + d.target.y); } //When the drag gesture starts, the targeted node is fixed to the pointer //The simulation is temporarily “heated” during interaction by setting the target alpha to a non-zero value. function dragstarted(d) { if (!d3.event.active) simulation.alphaTarget(0.3).restart();//sets the current target alpha to the specified number in the range [0,1]. d.fy = d.y; //fx - the node’s fixed x-position. Original is null. d.fx = d.x; //fy - the node’s fixed y-position. Original is null. } //When the drag gesture starts, the targeted node is fixed to the pointer function dragged(d) { d.fx = d3.event.x; d.fy = d3.event.y; } //the targeted node is released when the gesture ends // function dragended(d) { // if (!d3.event.active) simulation.alphaTarget(0); // d.fx = null; // d.fy = null; // console.log("dataset after dragged is ...",dataset); // } //drawing the legend const legend_g = svg.selectAll(".legend") .data(colorScale.domain()) .enter().append("g") .attr("transform", (d, i) => `translate(${width},${i * 20})`); legend_g.append("circle") .attr("cx", 0) .attr("cy", 0) .attr("r", 5) .attr("fill", colorScale); legend_g.append("text") .attr("x", 10) .attr("y", 5) .text(d => d); //drawing the second legend const legend_g2 = svg.append("g") //.attr("transform", (d, i) => `translate(${width},${i * 20})`); .attr("transform", `translate(${width}, 120)`); legend_g2.append("circle") .attr("r", 5) .attr("cx", 0) .attr("cy", 0) .style("stroke", "grey") .style("stroke-opacity",0.3) .style("stroke-width", 15) .style("fill", "black") legend_g2.append("text") .attr("x",15) .attr("y",0) .text("more mentions"); legend_g2.append("circle") .attr("r", 5) .attr("cx", 0) .attr("cy", 20) .style("stroke", "grey") .style("stroke-opacity",0.3) .style("stroke-width", 2) .style("fill", "black") legend_g2.append("text") .attr("x",15) .attr("y",20) .text("fewer mentions"); return div }; 35:[{"id":"1fa564c9e7ff75295a3c510e78e8d6615059ccf5bfb2a37857aa72db0002bc16deddd718bf4a78c586787c4d16dcad229a66f350bf6051a01ebca99cadb2784f","href":"https://static.observableusercontent.com/files/1fa564c9e7ff75295a3c510e78e8d6615059ccf5bfb2a37857aa72db0002bc16deddd718bf4a78c586787c4d16dcad229a66f350bf6051a01ebca99cadb2784f","name":"graphready@3.json","type":"application/json","lastModified":1641227786471.119,"size":302154}] 32:{"id":"c6bd6550bb6d9032","slug":"force-directed-graph-network-graph-with-arrowheads-and-lab","title":"Force-Directed Graph(Network graph) with arrowheads and labels","thumbnail":"173d66c0bcb431de6474e47f6090aba4492f26e329b9530f59933afe4e9d44cf","access_level":"public","create_time":"$D2022-01-03T04:18:29.142Z","update_time":"$D2022-01-10T15:45:49.102Z","view_time":null,"first_public_time":"$D2022-01-03T16:45:22.410Z","has_unpublished_edits":null,"fork":{"id":"3be2b020673c6c71","slug":"force-directed-graph-network-graph-with-arrowheads-and-lab","title":"Force-Directed Graph(Network graph) with arrowheads and labels","owner":{"id":"07eb89e13a02f14c","login":"xianwu","name":""}},"stars":0,"starred":false,"owner":{"type":"team","id":"60b0a2ab7117436b","login":"johnmulligan","name":"John Mulligan","avatar_url":"https://avatars-next.observableusercontent.com/5a9ebb8ea512be60a74ba33a0637036d1ef90bdfaa2dd222bba8b4b56408da2a","tier":"starter_2024"},"version":246,"publish_version":246,"role":null,"authored":false,"authors":[{"type":"individual","id":"208b3c71416bef97","login":"johnmulligan","name":"John Mulligan","avatar_url":"https://avatars-next.observableusercontent.com/5a9ebb8ea512be60a74ba33a0637036d1ef90bdfaa2dd222bba8b4b56408da2a","tier":null}],"members":[{"type":"individual","id":"208b3c71416bef97","login":"johnmulligan","name":"John Mulligan","avatar_url":"https://avatars-next.observableusercontent.com/5a9ebb8ea512be60a74ba33a0637036d1ef90bdfaa2dd222bba8b4b56408da2a","tier":null,"role":"editor"}],"comments":[],"custom_thumbnail":false,"trashed":false,"lapsed":null,"subscribed":null,"forks":0,"collection":null,"type":"notebook","body":{"title":"Force-Directed Graph(Network graph) with arrowheads and labels","cells":[{"id":0,"value":"md`# Force-Directed Graph(Network graph) with arrowheads and labels`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":112,"value":"// will make my data calls like this: https://observablehq.com/@cengique/api-data-example\n// and return labeled nodes and edges\n// the labels will have to be pre-flattened because enslavers and enslaved will have differently-structured biographical data, and we don't want to deal with that in javascript -- and we should assign enslavers and enslaved different colors on the graph (and maybe subdivide enslavers based on roles -- the problem here being that some have multiple roles, so that makes for a lot of individuated groups)\n// we could also pre-calculate the maximum size of the nodes, as we want that non-linear -- some of the buyers are so outsized that they literally block the graph\n// and inputs like this: https://observablehq.com/@observablehq/interactivity-in-observable#range","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":140,"value":"json_data=FileAttachment(\"graphready@3.json\").json();","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":6,"value":"md`-- SET UP --`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":7,"value":"d3 = require('d3@5')","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":19,"value":"margin = ({top: 30, right: 80, bottom: 5, left: 5}); 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If not specified, will default to the index of a node.\n .distance(120)\n ) \n .force(\"charge\", d3.forceManyBody().strength(-700)) // This adds repulsion (if it's negative) between nodes. \n .force(\"center\", d3.forceCenter(width / 2, height / 2)); // This force attracts nodes to the center of the svg area","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":27,"value":"$34","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":186,"value":"","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"}],"files":"$W35","stdlib":"1","titling":"auto"}} 33:"$32:body" </article></body></html>

2e:null 2f:["$","title",null,{"children":"Force-Directed Graph(Network graph) with arrowheads and labels | John Mulligan | Observable"}] 34:T1af8,myChart={ const div = html`

`; const svg = d3.select(div) .append("svg") .attr("width", width + margin.left + margin.right) .attr("height", height + margin.top + margin.bottom) .append("g") .attr("transform", `translate(${margin.left},${margin.top})`); //appending little triangles, path object, as arrowhead //The element is used to store graphical objects that will be used at a later time //The element defines the graphic that is to be used for drawing arrowheads or polymarkers on a given , , or element. svg.append('defs').append('marker') .attr("id",'arrowhead') .attr('viewBox','-0 -5 10 10') //the bound of the SVG viewport for the current SVG fragment. defines a coordinate system 10 wide and 10 high starting on (0,-5) .attr('refX',23) // x coordinate for the reference point of the marker. If circle is bigger, this need to be bigger. .attr('refY',0) .attr('orient','auto') .attr('markerWidth',13) .attr('markerHeight',13) .attr('xoverflow','visible') .append('svg:path') .attr('d', 'M 0,-5 L 10 ,0 L 0,5') .attr('fill', '#999') .style('stroke','none'); const dataset=json_data; console.log(dataset); // Initialize the links const link = svg.selectAll(".links") .data(dataset.links) .enter() .append("line") .attr("class", "links") .attr('marker-end','url(#arrowhead)') //The marker-end attribute defines the arrowhead or polymarker that will be drawn at the final vertex of the given shape. //The element provides an accessible, short-text description of any SVG container element or graphics element. //Text in a <title> element is not rendered as part of the graphic, but browsers usually display it as a tooltip. link.append("title") .text(d => d.type); const edgepaths = svg.selectAll(".edgepath") //make path go along with the link provide position for link labels .data(dataset.links) .enter() .append('path') .attr('class', 'edgepath') .attr('fill-opacity', 0) .attr('stroke-opacity', 0) .attr('id', function (d, i) {return 'edgepath' + i}) .style("pointer-events", "none"); const edgelabels = svg.selectAll(".edgelabel") .data(dataset.links) .enter() .append('text') .style("pointer-events", "none") .attr('class', 'edgelabel') .attr('id', function (d, i) {return 'edgelabel' + i}) .attr('font-size', 10) .attr('fill', '#aaa'); edgelabels.append('textPath') //To render text along the shape of a <path>, enclose the text in a <textPath> element that has an href attribute with a reference to the <path> element. .attr('xlink:href', function (d, i) {return '#edgepath' + i}) .style("text-anchor", "middle") .style("pointer-events", "none") .attr("startOffset", "50%") .text(d => d.type); // Initialize the nodes const node = svg.selectAll(".nodes") .data(dataset.nodes) .enter() .append("g") .attr("class", "nodes") .call(d3.drag() //sets the event listener for the specified typenames and returns the drag behavior. .on("start", dragstarted) //start - after a new pointer becomes active (on mousedown or touchstart). .on("drag", dragged) //drag - after an active pointer moves (on mousemove or touchmove). //.on("end", dragended) //end - after an active pointer becomes inactive (on mouseup, touchend or touchcancel). ); node.append("circle") .attr("r", d=> 17)//+ d.runtime/20 ) .style("stroke", "grey") .style("stroke-opacity",0.3) .style("stroke-width", d => d.size/10) .style("fill", d => colorScale(d.group)) node.append("title") .text(d => d.id + ": " + d.label + " - " + d.group); node.append("text") .attr("dy", 4) .attr("dx", -15) .text(d => d.name); node.append("text") .attr("dy",12) .attr("dx", -8) .text(d=> d.size); //Listen for tick events to render the nodes as they update in your Canvas or SVG. simulation .nodes(dataset.nodes) .on("tick", ticked); simulation.force("link") .links(dataset.links); // This function is run at each iteration of the force algorithm, updating the nodes position (the nodes data array is directly manipulated). function ticked() { link.attr("x1", d => d.source.x) .attr("y1", d => d.source.y) .attr("x2", d => d.target.x) .attr("y2", d => d.target.y); node.attr("transform", d => `translate(${d.x},${d.y})`); edgepaths.attr('d', d => 'M ' + d.source.x + ' ' + d.source.y + ' L ' + d.target.x + ' ' + d.target.y); } //When the drag gesture starts, the targeted node is fixed to the pointer //The simulation is temporarily “heated” during interaction by setting the target alpha to a non-zero value. function dragstarted(d) { if (!d3.event.active) simulation.alphaTarget(0.3).restart();//sets the current target alpha to the specified number in the range [0,1]. d.fy = d.y; //fx - the node’s fixed x-position. Original is null. d.fx = d.x; //fy - the node’s fixed y-position. Original is null. } //When the drag gesture starts, the targeted node is fixed to the pointer function dragged(d) { d.fx = d3.event.x; d.fy = d3.event.y; } //the targeted node is released when the gesture ends // function dragended(d) { // if (!d3.event.active) simulation.alphaTarget(0); // d.fx = null; // d.fy = null; // console.log("dataset after dragged is ...",dataset); // } //drawing the legend const legend_g = svg.selectAll(".legend") .data(colorScale.domain()) .enter().append("g") .attr("transform", (d, i) => `translate(${width},${i * 20})`); legend_g.append("circle") .attr("cx", 0) .attr("cy", 0) .attr("r", 5) .attr("fill", colorScale); legend_g.append("text") .attr("x", 10) .attr("y", 5) .text(d => d); //drawing the second legend const legend_g2 = svg.append("g") //.attr("transform", (d, i) => `translate(${width},${i * 20})`); .attr("transform", `translate(${width}, 120)`); legend_g2.append("circle") .attr("r", 5) .attr("cx", 0) .attr("cy", 0) .style("stroke", "grey") .style("stroke-opacity",0.3) .style("stroke-width", 15) .style("fill", "black") legend_g2.append("text") .attr("x",15) .attr("y",0) .text("more mentions"); legend_g2.append("circle") .attr("r", 5) .attr("cx", 0) .attr("cy", 20) .style("stroke", "grey") .style("stroke-opacity",0.3) .style("stroke-width", 2) .style("fill", "black") legend_g2.append("text") .attr("x",15) .attr("y",20) .text("fewer mentions"); return div }; 35:[{"id":"1fa564c9e7ff75295a3c510e78e8d6615059ccf5bfb2a37857aa72db0002bc16deddd718bf4a78c586787c4d16dcad229a66f350bf6051a01ebca99cadb2784f","href":"https://static.observableusercontent.com/files/1fa564c9e7ff75295a3c510e78e8d6615059ccf5bfb2a37857aa72db0002bc16deddd718bf4a78c586787c4d16dcad229a66f350bf6051a01ebca99cadb2784f","name":"graphready@3.json","type":"application/json","lastModified":1641227786471.119,"size":302154}] 32:{"id":"c6bd6550bb6d9032","slug":"force-directed-graph-network-graph-with-arrowheads-and-lab","title":"Force-Directed Graph(Network graph) with arrowheads and labels","thumbnail":"173d66c0bcb431de6474e47f6090aba4492f26e329b9530f59933afe4e9d44cf","access_level":"public","create_time":"$D2022-01-03T04:18:29.142Z","update_time":"$D2022-01-10T15:45:49.102Z","view_time":null,"first_public_time":"$D2022-01-03T16:45:22.410Z","has_unpublished_edits":null,"fork":{"id":"3be2b020673c6c71","slug":"force-directed-graph-network-graph-with-arrowheads-and-lab","title":"Force-Directed Graph(Network graph) with arrowheads and labels","owner":{"id":"07eb89e13a02f14c","login":"xianwu","name":""}},"stars":0,"starred":false,"owner":{"type":"team","id":"60b0a2ab7117436b","login":"johnmulligan","name":"John Mulligan","avatar_url":"https://avatars-next.observableusercontent.com/5a9ebb8ea512be60a74ba33a0637036d1ef90bdfaa2dd222bba8b4b56408da2a","tier":"starter_2024"},"version":246,"publish_version":246,"role":null,"authored":false,"authors":[{"type":"individual","id":"208b3c71416bef97","login":"johnmulligan","name":"John Mulligan","avatar_url":"https://avatars-next.observableusercontent.com/5a9ebb8ea512be60a74ba33a0637036d1ef90bdfaa2dd222bba8b4b56408da2a","tier":null}],"members":[{"type":"individual","id":"208b3c71416bef97","login":"johnmulligan","name":"John Mulligan","avatar_url":"https://avatars-next.observableusercontent.com/5a9ebb8ea512be60a74ba33a0637036d1ef90bdfaa2dd222bba8b4b56408da2a","tier":null,"role":"editor"}],"comments":[],"custom_thumbnail":false,"trashed":false,"lapsed":null,"subscribed":null,"forks":0,"collection":null,"type":"notebook","body":{"title":"Force-Directed Graph(Network graph) with arrowheads and labels","cells":[{"id":0,"value":"md`# Force-Directed Graph(Network graph) with arrowheads and labels`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":112,"value":"// will make my data calls like this: https://observablehq.com/@cengique/api-data-example\n// and return labeled nodes and edges\n// the labels will have to be pre-flattened because enslavers and enslaved will have differently-structured biographical data, and we don't want to deal with that in javascript -- and we should assign enslavers and enslaved different colors on the graph (and maybe subdivide enslavers based on roles -- the problem here being that some have multiple roles, so that makes for a lot of individuated groups)\n// we could also pre-calculate the maximum size of the nodes, as we want that non-linear -- some of the buyers are so outsized that they literally block the graph\n// and inputs like this: https://observablehq.com/@observablehq/interactivity-in-observable#range","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":140,"value":"json_data=FileAttachment(\"graphready@3.json\").json();","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":6,"value":"md`-- SET UP --`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":7,"value":"d3 = require('d3@5')","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":19,"value":"margin = ({top: 30, right: 80, bottom: 5, left: 5}); ","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":20,"value":"width = 800","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":22,"value":"height = 800","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":9,"value":"html`\n<style> \n\n .links { \n stroke: #999; \n stroke-opacity: 0.6; \n stroke-width: 1px; \n }\n\n text {\n pointer-events: none;\n fill: #000;\n font: 10px sans-serif;\n }\n\n svg{\n border:1px solid #000;\n }\n\n</style>`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":12,"value":"md`-- DATA --`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":54,"value":"colorScale = d3.scaleOrdinal() //=d3.scaleOrdinal(d3.schemeSet2)\n .domain([\"enslavers\", \"enslaved\"])\n .range(['#ff9e6d', '#86cbff'])","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":15,"value":"//create a simulation for an array of nodes, and compose the desired forces.\nsimulation = d3.forceSimulation()\n .force(\"link\", d3.forceLink() // This force provides links between nodes\n .id(d => d.id) // This sets the node id accessor to the specified function. If not specified, will default to the index of a node.\n .distance(120)\n ) \n .force(\"charge\", d3.forceManyBody().strength(-700)) // This adds repulsion (if it's negative) between nodes. \n .force(\"center\", d3.forceCenter(width / 2, height / 2)); // This force attracts nodes to the center of the svg area","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":27,"value":"$34","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":186,"value":"","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"}],"files":"$W35","stdlib":"1","titling":"auto"}} 33:"$32:body" </article></body></html>